Wait for your confirmation tweet from American Express that you will be getting the credit

Spend $250 at Best Buy (In store or online) and you will immediately get an email from American Express confirming the credit

- Best Buy eGift Cards and Corporate Cards do not count for this!
- Not valid at Best Buy Express, Geek Squad Serviced made outside of Best, Buy, Best Buy Parts Store, Best Buy Private Store and Auction or at standalone Pacific Sales Stores

What to buy?

Gift Cards

Online

You can buy 3rd party gift cards here (HT- DoC), but nothing too exciting. If you are a raise bulk seller you might get excited about iTunes gift cards. They are 10% off. Your total price would be $200 for $250 of iTunes Gift card. Too much work for too little payoff for me.

In Store

You can buy $200 Best Buy gift cards in store. That will enable you to make larger purchases than $250 with the full discount.
Alternatively, some Best Buy stores sell $200 Visa Gift Cards and/or Amazon Gift Cards.

Reselling Idea

Here is one idea for Reselling if you buy gift cards in store.

iPad min 3 128GB - currently being sold for $449 at Best Buy. That's about $490 with tax for me. It's about $540 on Amazon. That's just about break even price, not worth it on its own.

If you are able to get 10% off from the $449 price, your price will be about $40 after tax. You would probably earn around $30-$50 per iPad. This is a lot of work for that, but it should work.

Keep in mind that you will not earn Best Buy Rewards points for purchases with gift cards (often you don't earn Shopping Portal points as well). I don't know if you earn them when you buy the gift cards. You can try to confirm that in store.